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What Makes a Method Thread-safe? What are the rules?
...eadSafeMethod concurrently without issue.
public class Thing
{
public int ThreadSafeMethod(string parameter1)
{
int number; // each thread will have its own variable for number.
number = parameter1.Length;
return number;
}
}
This is also true if the method call...
How to get all subsets of a set? (powerset)
... is 2 ** len(A), so that could clearly be seen in the for loop.
I need to convert the input (ideally a set) into a list because by a set is a data structure of unique unordered elements, and the order will be crucial to generate the subsets.
selector is key in this algorithm. Note that selector ha...
What is the “right” JSON date format?
...is a non-standard hack/extension.
I would use a format that can be easily converted to a Date object in JavaScript, i.e. one that can be passed to new Date(...). The easiest and probably most portable format is the timestamp containing milliseconds since 1970.
...
What is Func, how and when is it used
...
No, I'm correct. static int OneArgFunc(this string i) { return 42; } Func<int> f = "foo".OneArgFunc;. =)
– Ark-kun
Jan 9 '14 at 9:21
...
How can I put a ListView into a ScrollView without it collapsing?
...problem, and the only answer I can find seems to be " don't put a ListView into a ScrollView ". I have yet to see any real explanation for why though. The only reason I can seem to find is that Google doesn't think you should want to do that. Well I do, so I did.
...
What is the difference between IQueryable and IEnumerable?
...of the query has to be represented in data such that the LINQ provider can convert it into the appropriate form for the out-of-memory execution - whether that's an LDAP query, SQL or whatever.
More in:
LINQ : IEnumerable<T> and IQueryable<T>
C# 3.0 and LINQ.
"Returning IEnumerable<...
When do you use varargs in Java?
...d a mechanism to pass in any number of objects.
String.format("This is an integer: %d", myInt);
String.format("This is an integer: %d and a string: %s", myInt, myString);
share
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improve this answ...
Use JNI instead of JNA to call native code?
...ill perform worse than with JNI. For example when passing arrays, JNA will convert these from Java to native at the beginning of each function call and back at the end of the function call. With JNI, you can control yourself when a native "view" of the array is generated, potentially only creating a...
What's the difference of $host and $http_host in Nginx
...ER (ref).
$http_HEADER
The value of the HTTP request header HEADER when converted to lowercase and with 'dashes' converted to 'underscores', e.g. $http_user_agent, $http_referer...;
Summarizing:
$http_host equals always the HTTP_HOST request header.
$host equals $http_host, lowercase and witho...
In laymans terms, what does 'static' mean in Java? [duplicate]
...n instance of the object to be used.
public class SomeObject {
public int someField;
public void someMethod() { };
public Class SomeInnerClass { };
}
In order to use someField, someMethod, or SomeInnerClass I have to first create an instance of SomeObject.
public class SomeOtherObjec...